diff --git a/AlgebraicDataflowArchitectureModel/models/SimpleUI.model b/AlgebraicDataflowArchitectureModel/models/SimpleUI.model
index 3e03bbd..49341ac 100644
--- a/AlgebraicDataflowArchitectureModel/models/SimpleUI.model
+++ b/AlgebraicDataflowArchitectureModel/models/SimpleUI.model
@@ -54,9 +54,25 @@
 }
 
 channel ScreenTransition {
-	in curScreen(curScId: Str, transScreen(nextScId, nextSc)) = nextScId
-	in screenTemplates.{nextScId}(curSc, transScreen(nextScId, nextSc)) = nextSc
-	out screen(curS, transScreen(nextScId, nextSc)) = nextSc
+	in curScreen(curScId: Str, transScreen(nextScId, screen)) = nextScId
+	ref screenTemplates.{nextScId}(screen, transScreen(nextScId, screen))
+	out screen(curS, transScreen(nextScId, screen)) = screen
+}
+
+channel EventDispatch(wid: Str) {
+	in screen.widgets.{wid}.state(curState: Int, dispatchEvent(curScId, wid, nextState)) = nextState
+	ref curScreen(curScId: Str, dispatchEvent(curScId, wid, nextState))
+	out screenTemplates.{curScId}.widgets.{wid}.state(curState: Int, dispatchEvent(curScId, wid, nextState)) = nextState
+}
+
+channel EventHandler1(scId: Str, wid: Str) {
+	in screenTemplates.{scId="000"}.widgets.{wid="002"}.state(curState: Int, handleEvent1(nextState)) = nextState
+	out curScreen(curScId: Str, handleEvent1(nextState)) = if(nextState == 0, "001", curScId)
+}
+
+channel EventHandler2(scId: Str, wid: Str) {
+	in screenTemplates.{scId="001"}.widgets.{wid="004"}.state(curState: Int, handleEvent2(nextState)) = nextState
+	out curScreen(curScId: Str, handleEvent2(nextState)) = if(nextState == 0, "000", curScId)
 }
 
 channel ChangeLayout {